CN210188164U - Asynchronous pressing and drawing forming die - Google Patents

Abstract

The utility model discloses an asynchronous material of pressing draws forming die, including last mould body, die holder, terrace die and die, the lower part at last mould body is established to the die, the upper portion at the die holder is established to the terrace die, the terrace die is fixed to be established on the die holder, and the outside of terrace die is equipped with movable blank holder down, and the center of terrace die is equipped with mobilizable support core, sliding fit between terrace die and the support core, and the die is fixed to be established and forms fixed terrace die on last mould body, and the outside of die is equipped with movable last blank holder, go up blank holder and lower blank holder and set up relatively from top to bottom, the lower surface of die sets up relatively with the upper surface of terrace die and support core and is used for the sheet material shaping. The asynchronous blank holder drawing forming die for the inner plate of the small-curvature back door realizes multiple drawing forming in one process, solves the problem that an aluminum alloy workpiece of a small-curvature complex inner covering part is not fully wrinkled and cracked during drawing forming, and improves the drawing quality; and the one-time punch forming can be completed, thereby reducing the cost.

Description

Asynchronous pressing and drawing forming die

Technical Field

The utility model belongs to the technical field of the drawing forming technique and specifically relates to an asynchronous pressure material drawing forming die that presses is related to.

Background

The existing drawing die structure is shown in figure 2 and mainly comprises three parts, namely a female die, a blank holder and a male die, wherein the drawing forming working process comprises the following steps: the female die is descended along with an upper slide block of a press machine when the stamping is started, the female die is contacted with the plate and the blank holder and further descended along with the press machine, meanwhile, a lower gas point of the press machine is propped against a gas ejector rod connecting column of the die and the blank holder under the combined action, the plate is contacted with the male die, the female die is used for pressing the plate and the blank holder to descend to a dead point under the action of the press machine, and the female die, the blank holder and the male die are closed to the dead; along with the return stroke of the press machine, the female die ascends along with the slide block of the press machine, the plate props against the gas ejection rod connecting column of the die and ascends by a stroke with the blank holder by the lower gas cushion of the press machine, the male die is fixed, the plate is separated from the male die, and the plate is taken away to complete a complete die stamping process.

The existing drawing die structure is widely applied to the stamping die of the automobile covering part, has a simple structure and can meet the drawing and stamping forming requirements of the simple covering part. The product is characterized in that a flange area is flat, the drawing depth is shallow, the product shape is complex, and if the product is drawn and formed according to a conventional process, the product has the defects of insufficient flange area forming, position cracking caused by sharp shape complex change and severe wrinkling. These problems can not be completely solved by debugging in the actual die manufacturing, which not only can reduce the quality of the automobile panel product, but also can affect the die manufacturing cycle. Secondary drawing is one means for solving the problem, but increasing the drawing process means increasing a set of stamping dies and increasing the development cost.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to solve the technical problem that an asynchronous pressure material drawing forming die is provided, it can draw one shot forming to little curvature aluminum alloy plate.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides an asynchronous material of pressing draws forming die, includes mould body, die holder, terrace die and die, the die is established in the lower part of mould body, the terrace die is established on the upper portion of die holder, the terrace die is fixed to be established on the die holder, and the outside of terrace die is equipped with movable lower blank holder, and the center of terrace die is equipped with mobilizable support core, sliding fit between terrace die and the support core, and the die is fixed to be established on mould body and is formed fixed terrace die, and the outside of die is equipped with movable upper blank holder, upper blank holder and lower blank holder set up relatively from top to bottom, the lower surface of die sets up relatively with the upper surface of terrace die and support core and is used for the sheet material shaping.

The male die and the support core are in guide fit through the guide plate, and the male die and the support core form a male die structure together.

The upper blank holder is arranged on the upper die body through a nitrogen spring, the lower part of the support core is provided with a support core gas ejector rod connecting column, the lower part of the lower blank holder is provided with a lower blank holder gas ejector rod connecting column, and the lower die base is provided with gas ejector rods corresponding to the support core gas ejector rod connecting column and the lower blank holder gas ejector rod connecting column respectively.

The support core is arranged corresponding to the flat part of the drawn product.

The fixed male die is arranged corresponding to the structurally complex part of the drawn product.

And the lower edge pressing ring is in guide fit with the fixed male die through a guide plate.

Compared with the prior art, the utility model, have following advantage:

the asynchronous pressing drawing forming die is reasonable in design, multiple drawing forming is realized in one process by the asynchronous blank holder drawing forming die for the inner plate of the small-curvature back door, the problem that an aluminum alloy part of a small-curvature complex inner covering part is not fully wrinkled and cracked during drawing forming is solved, and the drawing quality is improved; and the one-time punch forming can be completed, thereby reducing the cost.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

fig. 1 is a schematic sectional view of the drawing and forming die of the present invention.

Fig. 2 is a schematic cross-sectional view of a conventional drawing die.

In the figure:

1. the device comprises a lower die base, 2 parts of male dies, 3 parts of core supporting air ejector rod connecting columns, 4 parts of core supporting, 5 parts of lower edge pressing ring air ejector rod connecting columns, 6 parts of lower edge pressing rings, 7 parts of an upper die body, 8 parts of nitrogen springs, 9 parts of upper edge pressing rings and 10 parts of female dies.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

The asynchronous pressing and drawing forming die comprises an upper die body, a lower die holder, a male die and a female die, wherein the female die is arranged on the lower portion of the upper die body, the male die is arranged on the upper portion of the lower die holder and fixedly arranged on the lower die holder, a movable lower edge pressing ring is arranged on the outer side of the male die, a movable supporting core is arranged at the center of the male die, the male die and the supporting core are in sliding fit, the female die is fixedly arranged on the upper die body to form a fixed male die, a movable upper edge pressing ring is arranged on the outer side of the female die, the upper edge pressing ring and the lower edge pressing ring are arranged vertically and oppositely, and the lower surface of the female die.

The male die and the support core are in guide fit through the guide plate, and the male die and the support core jointly form a male die structure. The lower edge pressing ring is matched with the fixed male die through a guide plate in a guiding way.

The upper blank holder is arranged on the upper die body through a nitrogen spring, the lower part of the support core is provided with a support core gas ejector rod connecting column, the lower part of the lower blank holder is provided with a lower blank holder gas ejector rod connecting column, and the lower die base is correspondingly provided with a support core gas ejector rod connecting column and a lower blank holder gas ejector rod connecting column respectively.

The support core is arranged corresponding to the flat part of the drawn product. The fixed male die is arranged corresponding to the structurally complex part of the drawn product. The asynchronous blank holder drawing forming die for the inner plate of the small-curvature back door realizes multiple drawing forming in one process, solves the problem that an aluminum alloy workpiece of a small-curvature complex inner covering part is not fully wrinkled and cracked during drawing forming, and improves the drawing quality; and the one-time punch forming can be completed, thereby reducing the cost.

Preferably, as shown in fig. 1, the die structure includes a lower die holder 1, a male die 2, a core support gas ejector rod connecting column 3, a core support 4, a lower edge pressing ring gas ejector rod connecting column 5, a lower edge pressing ring 6, an upper die body 7, a nitrogen spring 8, an upper edge pressing ring 9 and a female die 10; the male die 2 is fixed on the lower die holder 1; the support core 4 and the male die 2 are in guide fit through a guide plate and are connected with a lower die holder through a working bolt, the working stroke of the support core is controlled by the stroke of the working bolt, the lower edge pressing ring 6 is in guide fit with the male die and is connected with the lower die holder 1 through a safety bolt, the female die 10 is fixed on the upper die body 7, a nitrogen spring is fixed on the upper die body 7, the upper edge pressing ring 9 is connected with the safety side pin and the upper die body 7 through a working side pin, the nitrogen spring acts on the upper edge pressing ring 9 and provides pressure for the upper edge pressing ring 7, movement is realized between the contact parts through the guide plate and the guide sliding surface in a matching and guiding mode, respective movement functions of the parts are realized through the action of a press, and the.

The drawing depth and the forming shape of a product are complex, and the product is fully drawn, so that the female die 10 and the male die 2 are arranged as main drawing areas; the female die 10 is fixed on the upper die body 7, the male die 2 is fixed on the lower die holder 1, an upper blank holder 9 and a lower blank holder 6 are arranged outside the main forming area, and the upper blank holder 9 provides a constant forming force by a nitrogen spring 8; the material supporting core 4 is arranged in the middle of the lower die male die, the lower blank holder 6 and the material supporting core simultaneously work under the action of a gas ejector rod of a press machine, and the plate contacts with the male die 2 and the female die 10 to complete the drawing process under the combined action of the upper blank holder 9, the lower blank holder 6 and the material supporting core 4 along with the further work of the press machine.

In the stamping process, the plate drawing forming die is different from the traditional drawing die in that only the die pressing surface and the blank holder press the plate after the die rigid pressing surface and the blank holder contact with the die and the punch, and the plate is not controlled in drawing forming in the die.

In the working process of the press, an upper blank holder 9, an upper die body 7 and a female die move downwards together, the upper blank holder 9 presses a plate and the lower blank holder 7 tightly at a constant pressure by a nitrogen spring 8, the lower blank holder 6 and a support core 4 are jacked up by a pneumatic rod jacking force, the support core 4 and the female die 10 are in the further die assembling process of the die, the plate starts to gradually contact and gradually compact between the female die 10 and the support core 4, in the continuous drawing forming work, the plate is fully drawn under the action of the female die 10 and the male die 2 except the compaction of the plate, in the drawing process of the plate, the plate flows between the upper blank holder 9 and the lower blank holder 6, the full forming of the plate in drawing is ensured, and meanwhile, the problem of the stamping process that the covering part with small curvature in a complex shape is subjected to drawing forming and wrinkling is solved.

Arranging a forming male die and a movable support core according to regions with small curvature and different depths of a product; the fixed male die is arranged in the small-curvature deep drawing area and is directly installed on the lower die seat, the movable support core is designed at the flat part inside the product and is in contact with the female die to press the plate, the working bolt enables the movable support core to be connected with the lower die body, and the stroke of the movable support core and the blank holder outside the product are determined by a specific stamping process.

According to the characteristic that the drawing curvature of a workpiece is small and the depth difference is large, in the first-order die structure, an upper die is designed into a product, a fixed female die is designed in the product, a floating upper blank holder is designed on the outer side of the product, a lower die is designed into a male die fixed and movable support core, the movable support core and a lower blank holder work under the action of a push rod of a press, and the drawing forming is carried out at different time intervals of the pressing. The method can not only solve the forming defect of a flange shallow drawing area, but also ensure that the plate cracking and sheet wrinkling defect does not occur in a small-curvature deep drawing area.

In the stamping process, the upper blank holder 9 and the lower blank holder 6 play a role in material pressing, meanwhile, the outer side also participates in forming, along with the continuous work of a press, the support core 4 presses the plate material to control the material pressing force of the flat part on the inner side after contacting with the female die 10 in the stamping process, and under the control of the internal and external material pressing forces, the male die 2 and the female die 10 finish the small-curvature deep drawing forming, so that the cracking of a small-curvature deep drawing area can be prevented, the wrinkling problem caused by overlarge feeding amount is avoided, and the drawing rigidity of the plate is fully enhanced.

The molding process specifically comprises the following steps:

firstly, a working die assembly stage:

(1) before stamping, the die is in an open state, the nitrogen spring 8 is in a release non-working state, the upper blank holder 9 reaches the maximum stroke position, and the working side pin is in a stressed state;

(2) when the press starts to work, the lower edge pressing ring 6 and the support core 4 are under the action of the press gas ejector rod, the pressure of the press gas ejector rod transmits force to the lower edge pressing ring 6 and the support core 4 through the lower edge pressing ring gas ejector rod connecting column 5 and the support core gas ejector rod connecting column 3 respectively, and the lower edge pressing ring 6 and the support core 4 are lifted to a working state.

(3) The upper die body 7, the female die 10 and the upper blank holder 9 move downwards along with the press, the upper blank holder 9 and the lower blank holder 6 firstly contact and press the plate, and the nitrogen spring 8 starts to compress to provide constant blank holding force for the upper blank holder 9, so that material pressing is realized;

(4) the press continues to move downwards, the upper blank holder 9 and the lower blank holder 6 press the plate to work with the press, the plate and the support core 4 are in the same shape stroke with the lower blank holder under the action of a press gas ejector rod, at the moment, the support core 4 starts to contact with the plate and presses the plate with the female die 10, and only external blank holder pressure different from the traditional drawing is formed, so that the plate receives external pressing force of the upper blank holder 9 and the lower blank holder 6 and is simultaneously subjected to internal pressing force of the female die 10 and the support core 4;

(5) the upper die body 7, the female die 10 and the upper blank holder 9 continue to work along with the press, at the moment, the female die 10 and the male die 2 start to participate in drawing forming, because the nitrogen spring 8 constantly provides pressure for the upper blank holder 9, at the moment, the lower blank holder 6 and the support core 4 reach a bottom dead center under the action of the female die 10 and the upper blank holder 9, the plate is controlled by the pressure inside and outside, the female die 10 and the male die 2 finish the drawing forming, the structure effectively controls the cracking and wrinkling problems of the complex small-curvature internal covering part in the drawing forming process, and the die drawing forming process is finished;

secondly, working and mold opening stage:

(1) the upper die body 7 moves upwards, the nitrogen spring 8 starts to release to provide return power for the upper blank holder 9, and before the upper die body 7 and the female die 10 are not completely separated from the male die 2, the upper blank holder 9 is attached to the lower blank holder 6 under the pressure of the nitrogen spring 8;

(2) the male die 2 and the female die 10 begin to separate from the plate along with the rising of the press, the plate is pressed by the upper blank holder 9 and the lower blank holder, and the lower blank holder 6 and the support core 4 begin to rise under the action of the gas ejector rod of the press along with the rising of the press;

(3) in the process that the press continuously rises and opens the die, the supporting core 4 starts to support the plate and starts to separate from the female die 10;

(4) with the continuous upward movement of the upper die body 7, the upper blank holder 9 and the lower blank holder 6 start to separate, the plate stops on the lower blank holder 6 and the support core 4 and is separated from the male die 2, and the upper blank holder 9 returns to the initial state under the action of the nitrogen spring 8;

(5) the female die 10 and the upper blank holder 9 of the upper die body 7 continue to move upwards along with the press, and the die is completely opened;

(6) taking the plate away, returning a gas ejector rod of the press, returning the lower pressing edge ring 6 and the support core 4 to the initial state, and ending die opening of the die;

from the above working principle, it can be seen that: according to the characteristics of large fluctuation of the drawing depth and small curvature of a workpiece, a female die of a traditional structure on a die structure is divided into a female die 10 and an upper blank holder 9, a male die is divided into a lower blank holder 6, a male die 2 and a support core 4, and the forming is carried out at different time intervals in the stamping process, so that the defects of full drawing forming of a spread part and no cracking and wrinkling of a product in a small-curvature deep drawing area can be overcome.

In summary, the asynchronous blank holder drawing forming tool for the inner plate of the back door with small curvature realizes multiple times of drawing forming in one process, solves the problem that an aluminum alloy part of an inner covering part with small curvature and complex is not fully wrinkled and cracked due to drawing forming, and saves the die development cost caused by adding processes for solving the problem. The design and manufacture level of enterprises is improved, and meanwhile, the production cost of an automobile host factory is reduced, and good economic benefits are brought.

The above-mentioned is only for the description of the preferred embodiments of the present invention, and the above-mentioned technical features can be combined at will to form a plurality of embodiments of the present invention.

The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.

Claims (6)

1. The utility model provides an asynchronous material of pressing draws forming die, includes mould body, die holder, terrace die and die, the die is established in the lower part of last mould body, the terrace die is established on the upper portion of die holder, its characterized in that: the male die is fixedly arranged on the lower die seat, a movable lower blank holder is arranged on the outer side of the male die, a movable support core is arranged at the center of the male die, the male die is in sliding fit with the support core, the female die is fixedly arranged on the upper die body to form the fixed male die, a movable upper blank holder is arranged on the outer side of the female die, the upper blank holder and the lower blank holder are arranged oppositely from top to bottom, and the lower surface of the female die, the upper surface of the male die and the upper surface of the support core are arranged oppositely to be used for sheet forming.

2. The asynchronous material pressing drawing forming die as claimed in claim 1, wherein: the male die and the support core are in guide fit through the guide plate, and the male die and the support core form a male die structure together.

3. The asynchronous material pressing drawing forming die as claimed in claim 1, wherein: the upper blank holder is arranged on the upper die body through a nitrogen spring, the lower part of the support core is provided with a support core gas ejector rod connecting column, the lower part of the lower blank holder is provided with a lower blank holder gas ejector rod connecting column, and the lower die base is provided with gas ejector rods corresponding to the support core gas ejector rod connecting column and the lower blank holder gas ejector rod connecting column respectively.

4. The asynchronous material pressing drawing forming die as claimed in claim 1, wherein: the support core is arranged corresponding to the flat part of the drawn product.

5. The asynchronous material pressing drawing forming die as claimed in claim 1, wherein: the fixed male die is arranged corresponding to the structurally complex part of the drawn product.

6. The asynchronous material pressing drawing forming die as claimed in claim 1, wherein: and the lower edge pressing ring is in guide fit with the fixed male die through a guide plate.

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